Set up NTP synchronisation

The NTP synchronisation provides for a regular update of the internal clock of the router.

The following elements are required to synchronise the internal clock with the NTP (Network Time Protocol= server:

Specification of the NTP server and the timezone
Event for triggering the synchronisation
Firewall rule that permits the router to connect to NTP server
1. Click in the Administration → Time / Date menu in the Clock synchronisation section on and select the Time zone of the router location.
2. Take the suggested NTP server of the Physikalisch-Technische Bundesanstalt or enter the address of an alternative NTP server into the Time server field.
3. Click on SUBMIT .
4. Click in the Events → Events menu on and add a new event:
Event: select a regular occurring event that is supposed to trigger the NTP synchronisation ^[1]
Action: Synchronise clocck via NTP
1. Click on SUBMIT .
2. Click in the Network → Firewall / NAT menu in the IP-Filter section on and add a new filter rule:
Packet direction: OUTPUT
IP version: All
Protocol: UDP
Output interface: select the configured WAN interface, e. g. lte2
Destination port: 123
1. Click on SUBMIT .
2. Click on ACTIVATE PROFILE .
3. To test the NTP synchronisation, click in the Administration → Time / Date menu in the Clock synchronisation section on .

1. A regular event can be the change of an interface state to online or the expiry of a timer for example.